800728020 has 72 divisors (see below), whose sum is σ = 2556721440. Its totient is φ = 202288320.

The previous prime is 800728013. The next prime is 800728031. The reversal of 800728020 is 20827008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113646 + ... + 120485.

It is an arithmetic number, because the mean of its divisors is an integer number (35510020).

Almost surely, 2^800728020 is an apocalyptic number.

It is an amenable number.

800728020 is an abundant number, since it is smaller than the sum of its proper divisors (1755993420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

800728020 is a wasteful number, since it uses less digits than its factorization.

800728020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234165 (or 234160 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 800728020 is about 28297.1380178279. The cubic root of 800728020 is about 928.5992788040.

The spelling of 800728020 in words is "eight hundred million, seven hundred twenty-eight thousand, twenty".